<template>
  <!-- 控制商品数量 -->
  <div class="my-counter">
    <!-- 给按钮绑定点击事件 -->
    <!-- 当数量<=1时添加禁止点击事件 -->
    <button type="button" :disabled="good.goods_count<=1" class="btn btn-light" @click="del">-</button>
    <input type="number" class="form-control inp" v-model="good.goods_count">
    <button type="button" class="btn btn-light" @click="add">+</button>
  </div>
</template>

<script>
export default {
  props:['good'],
  methods:{
    add() {
      this.good.goods_count++
    },
    del() {
      this.good.goods_count--
    }
  },
  watch:{
    good:{
      deep:true,
      handler() {
        if(this.good.goods_count<=1) {
          this.good.goods_count = 1
        }
      }
    }
  }
}
</script>

<style lang="less" scoped>
.my-counter {
  display: flex;
  .inp {
    width: 45px;
    text-align: center;
    margin: 0 10px;
  }
  .btn, .inp{
    transform: scale(0.9);
  }
}
</style>